US PATENT SUBCLASS 252 / 191
.~ Basis-iron containing

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

189  DF  CO, S, NEGATIVE ELEMENT, OR ACID, BINDANT CONTAINING {3}
191.~ Basis-iron containing

DEFINITION

Classification: 252/191

(under subclass 189) Compositions which contain elementary iron, or an oxide of iron, or other basic iron compound.